This paper illustrates a new and cost effective approach to the design and manufacture of intelligent sensors and control electronics that reliably operate up to 300 Degrees Centigrade. A description of this Silicon-on-insulator (SOI) technology for creating both the sensors and integrated circuits is provided. Measured results that demonstrate the inherent reliability of this technology at high temperatures are presented. Representative distributed control architectures and applications such as engine control units; valve position sensors and exhaust gas recirculation sensor electronics are illustrated. A new, SOI-based, 32-bit microprocessor powerful enough to form the “core” of an advanced engine control unit is described.